A numerical investigation on seismic improvement of the steel arch bridges by exchanging RC deck for aluminum deck

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  • ＲＣ床版をアルミニウム床版に取り替えることによる鋼アーチ橋の耐震性向上に関する解析的検討
  • RC ショウバン オ アルミニウム ショウバン ニ トリカエル コトニ ヨル コウ アーチバシ ノ タイシン セイコウ ジョウ ニ カンスル カイセキテキ ケントウ

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Abstract

It is common in the current steel arch bridges that the weight of the RC deck occupies more than half of the full weight of upper bridge structures. Therefore, the current steel arch bridges are one of the top heavy structures, and then, the large inertial forces act to the RC deck during an earthquake. In consequence, the arch rib base and an end support, etc. are damaged greatly in many cases if seismic design is insufficient. In this paper, as a seismic improvement of the steel arch bridges, the effect of the weight of the deck by exchanging the current RC deck for the lighter aluminum deck onto the improvement of inelastic behavior of the steel arch bridges is numerically investigated. It is found that the steel arch bridges with the aluminum deck are one of the effective seismic improvements.

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